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On the Earth, the ozonosphere allows life protecting living organisms by filtering out the harmful UV rays from the Sun and the scientists have discovered that around Venus, there would be an ozone layer hundreds of times less dense than that on our planet, in fact, observing the stars through the atmosphere of Venus, they would be less bright for cause of the filter effect for the ultraviolet rays performed by a thin layer of ozone (a gas with three oxygen atoms). Previous studies had already suggested that both Mars and Venus in ancient times there could have been an atmosphere similar to Earth's, then chemical and physical changes led to radical changes would make it almost impossible any form of life. To signal that in some areas on Earth has been recently reported an enlargement of the hole in the ozonosphere that would seem to have a cyclical trend.

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Telephone: +39 338 1809310 Date: 08/10/2011 article n°: 1705 _____________________________________________________________________________________________________